Retaining block



FIG. 1 is a front top perspective view of the new ornamental retaining block of the present invention.

FIG. 2 is a bottom rear perspective view thereof.

FIG. 3 is a front elevation view thereof.

FIG. 4 is a rear elevation view thereof.

FIG. 5 is a left elevation view thereof.

FIG. 6 is a right elevation view thereof.

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a bottom plan view thereof. 

CLAIM The ornamental design for a retaining block, as shown and described. 